fix: update Dockerfiles for upstream changes and build fixes

- gitea-mcp, mcp-grafana: bump Go from 1.24 to 1.26 (upstream go.mod
  now requires >= 1.26.x)
- proxmox-mcp: constrain requires-python to >=3.10 for fastmcp compat
- elasticsearch-mcp: add missing vendor repo to CloneVendorRepos.sh
  (elastic/mcp-server-elasticsearch)
- context7-mcp: add .npmrc to disable pnpm v10 strict built-deps check
- drawio-mcp: exclude dev-proxy package from build (upstream TS errors),
  build with pnpm v10 + .npmrc
- discourse-mcp, ghidra-mcp: remain blocked (upstream issues)

scripts/CloneVendorRepos.sh

@@ -91,6 +91,7 @@ clone_repo "gitea-mcp" "https://gitea.com/gitea/gitea-mcp.git"
 clone_repo "limesurvey-mcp" "https://github.com/TonisOrmisson/limesurvey-mcp.git"
 clone_repo "linkwarden-mcp-server" "https://github.com/irfansofyana/linkwarden-mcp-server.git"
 clone_repo "firefly-iii-mcp" "https://github.com/etnperlong/firefly-iii-mcp.git"
+clone_repo "mcp-server-elasticsearch" "https://github.com/elastic/mcp-server-elasticsearch.git"
 
 echo -e "${GREEN}=== All repositories cloned successfully! ===${NC}"
 echo ""